JP5805526B2 - Relative angle detection device and electric power steering device - Google Patents

Description

  The present invention relates to a relative angle detection device and an electric power steering device.

In recent years, an apparatus for detecting the relative rotation angle of two rotation shafts arranged coaxially with each other has been proposed.
For example, the device described in Patent Document 1 is arranged in the axial direction so as to be separated from the outer periphery of the magnetic circuit forming member of the first rotating body and the second rotating body that are coaxially connected by a torsion bar, Two magnetic flux collecting rings for collecting the magnetic flux generated by the magnetic circuit forming member, a detection unit for detecting torque applied to the first rotating body based on the density of the magnetic flux collected by each magnetic flux collecting ring, and the magnetic flux collecting ring And a holding ring having a detecting portion that holds the detecting portion and is attached to the housing on the outer peripheral portion, and a conductive wire connected to the detecting portion. The detection unit is configured such that the detection signal changes in accordance with the change in magnetic flux density generated between the convex pieces of the magnetism collecting ring, and the detection signal is transmitted to the control unit using a microprocessor via the conducting wire. Given.

JP 2007-187589 A

  A sensor (detection unit) housed in the housing and a device that receives a detection signal from the sensor and is arranged outside the housing are held by an electric wire holding member (grommet) inserted into the through hole of the housing. In the case of a configuration in which the electric wires (conductive wires) are connected, even if a force acts on the electric wires outside the housing, a large force may be exerted on the ends of the electric wires in the housing. For example, when the end of the electric wire is connected to the connector and the connector is inserted into the connection terminal, if a large force is applied to the end of the electric wire in the housing, the electric wire is dropped from the connector or the connector is inserted. There is a risk that the connected terminal may break. Moreover, there exists a possibility that the sealing performance of the electric wire in an electric wire holding member (grommet) may deteriorate because force acts on an electric wire outside a housing.

On the other hand, in the through hole of the housing, the electric wire holding member is prevented from dropping off at a portion outside the electric wire holding member, and the force acting on the electric wire outside the housing is difficult to be transmitted to the electric wire holding part of the electric wire holding member. It is also conceivable to arrange a member to be used.
In such a case, it is important to consider that the position where other parts are present outside the housing differs for each model on which the device for detecting the relative rotation angle is mounted.

  For this purpose, the present invention is a sensor that is housed in a housing in which a communication hole communicating between the inside and the outside is formed, and that outputs an electrical signal corresponding to the relative rotation angle of two rotation shafts arranged coaxially with each other. An electric wire that transmits an electric signal output from the sensor to a device disposed outside the housing, an electric wire holding member that is fitted into the communication hole of the housing and holds the electric wire, and the housing An outer member disposed at a site outside the electric wire holding member in the communication hole, and the outer member is introduced through the introduction portion and an introduction portion that introduces the electric wire into the inside. A relative angle detection device comprising: a plurality of lead-out portions that lead the electric wires to the outside in different directions.

Here, the outer member may include a plurality of extending portions extending in a direction intersecting a hole direction of the communication hole of the housing between the introduction portion and the lead-out portion.
In addition, there are a plurality of the introduction portions of the outer member, and the plurality of extension portions are led from different introduction portions, and the outer sides of the different electric wires led out from the same lead-out portion among the plurality of lead-out portions. It is good to be provided so that the length in the exterior of a member can be made substantially the same.
The outer member has a pair of split members that can be split in a direction intersecting the hole direction of the communication hole of the housing, and the plurality of extending portions are one split member of the pair of split members. Moreover, it is good to be formed so that it may extend toward the other division member.

  From another point of view, the present invention relates to a sensor that outputs an electrical signal corresponding to the relative rotation angle of two rotation shafts arranged coaxially with each other, and a communication hole that houses the sensor and communicates inside and outside. A housing in which the electrical signal output from the sensor is transmitted to a device disposed outside the housing, and an electrical wire holder that is fitted in the communication hole of the housing and holds the electrical wire A member, and an outer member disposed at a portion outside the wire holding member in the communication hole of the housing, and the outer member includes an introduction portion that guides the wire into the interior, and the introduction portion. It is an electric power steering device characterized by including a plurality of derivation parts which lead out the electric wire led in through to the outside in a different direction, respectively.

  According to the present invention, even if the position where the other parts exist outside the housing is different for each model, it is only necessary to arbitrarily select the lead-out portion for delivering the electric wire. Can be used.

It is sectional drawing of the electric power steering device to which the detection apparatus which concerns on embodiment is applied. It is a perspective view of the detection apparatus which concerns on embodiment. It is a figure which shows the direction of the electric current sent through a thin film ferromagnetic metal, and the direction of the magnetic field to apply. It is a figure which shows the relationship between a magnetic field strength and the resistance value of a thin film ferromagnetic metal at the time of changing a magnetic field strength in the state of FIG. It is a figure which shows the direction of the electric current sent through a thin film ferromagnetic metal, and the direction of the magnetic field to apply. It is a figure which shows the relationship between the direction of a magnetic field, and the resistance value of a thin film ferromagnetic metal. (A) is a figure which shows an example of MR sensor using the principle which detects the direction of a magnetic field with the magnetic field intensity more than prescription | regulation magnetic field intensity. (B) is the figure which showed the structure of MR sensor shown to (a) with the equivalent circuit. It is a figure which shows the relationship between the change of the magnetic field direction when a magnet carries out a linear motion, and the output of MR sensor. It is a figure which shows the other example of MR sensor. It is a figure which shows an example of the combination of the output used in detecting the moving direction of a magnet. It is a figure which shows the example of arrangement | positioning of MR sensor. It is a figure which shows the other example of MR sensor. It is an external view of the harness comp which concerns on this Embodiment. It is a schematic block diagram of a grommet and a socket. (A) is a schematic block diagram of a 2nd housing. (B) is BB sectional drawing in (a). (C) is a figure which shows the state with which the harness comp was mounted | worn with the 2nd housing. It is the figure which looked at the lower member from the upper member side. It is a figure which shows the state which passed the electric wire inside the socket. It is a figure which shows the other state which passed all the electric wires from the center exit. It is a figure which shows the other form of a housing.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of an electric power steering device 100 to which a detection device 10 according to an embodiment is applied. FIG. 2 is a perspective view of the detection apparatus 10 according to the embodiment. In FIG. 2, a part of a base 50 and a flat cable cover 60 described later are omitted for easy understanding of the configuration.

  The electric power steering apparatus 100 includes a first rotating shaft 110 and a second rotating shaft 120 that rotate coaxially. The first rotating shaft 110 is a rotating shaft to which, for example, a steering wheel is connected, and the second rotating shaft 120 is coaxially coupled to the first rotating shaft 110 via a torsion bar 130. The pinion 121 formed on the second rotating shaft 120 meshes with a rack (not shown) of a rack shaft (not shown) connected to the wheel, and the rotational motion of the second rotating shaft 120 is caused by the pinion 121. , Converted into a linear motion of the rack shaft through the rack, and the wheels are steered.

In addition, the electric power steering apparatus 100 includes a housing 140 that rotatably supports the first rotating shaft 110 and the second rotating shaft 120. The housing 140 is a member that is fixed to a main body frame (hereinafter also referred to as “vehicle body”) of a vehicle such as an automobile, and includes a first housing 150, a second housing 160, and a third housing 170. The
In the first housing 150, the bearing 151 that rotatably supports the second rotating shaft 120 is one of the rotating shaft directions of the second rotating shaft 120 (hereinafter sometimes simply referred to as “axial direction”). It is a member that is provided on the end side (lower side in FIG. 1) and is open on the other end side in the axial direction (upper side in FIG. 1).

The second housing 160 is a member having both ends in the axial direction opened, and the opening on one end side in the axial direction is opposed to the opening on the other end side in the axial direction in the first housing 150. Are arranged as follows. The second housing 160 is fixed to the first housing 150 by, for example, bolts. A communication hole 161 that communicates the inside and the outside is formed on the side surface of the second housing 160. The communication hole 161 includes a substantially elliptical columnar inner communication hole 161a into which a grommet 320 of the harness comp 300 described later is fitted, and a substantially elliptical columnar outer communication hole 161b into which the socket 330 of the harness comp 300 is fitted. It is configured to include. The outer communication hole 161b is formed larger than the inner communication hole 161a in the long side direction, although the elliptical short side direction is the same. In addition, the second housing 160 has a concave portion 162 (see FIG. 15) that is recessed from the surface that forms the outer communication hole 161b of the communication hole 161 in the middle of the elliptical column direction (communication hole direction) in the communication hole 161. It is formed on both sides of the ellipse in the long side direction. The recess 162 has a half-moon shape and has two vertical surfaces 162a that are surfaces perpendicular to the column direction.
The third housing 170 has a bearing 171 that rotatably supports the first rotating shaft 110 on the other end side in the axial direction (upper side in FIG. 1), and one end side in the axial direction ( In FIG. 1, the lower side is a member opened. Then, the opening on one end side in the axial direction is disposed so as to face the opening on the other end side in the axial direction of the second housing 160, and is fixed to the second housing 160 with a bolt or the like, for example. Is done.

In addition, the electric power steering apparatus 100 includes a worm wheel 180 fixed to the second rotating shaft 120 by press-fitting, for example, and a worm gear 191 meshing with the worm wheel 180 connected to the output shaft and fixed to the first housing 150. The electric motor 190 is provided.
In addition, the electric power steering apparatus 100 is based on a detection device 10 that outputs an electrical signal corresponding to the relative rotation angle between the first rotation shaft 110 and the second rotation shaft 120, and an output value from the detection device 10. And an electronic control unit (ECU) 200 that controls the driving of the electric motor 190.

The ECU 200 uses a CPU that performs various arithmetic processes, a ROM that stores programs executed by the CPU, various data, and the like, and a RAM that is used as a work memory for the CPU, and the like from the detection device 10. A relative angle calculation unit 210 that calculates the relative rotation angle between the first rotation shaft 110 and the second rotation shaft 120 based on the output value is provided.
The detection device 10 will be described in detail later.

  In the electric power steering apparatus 100 configured as described above, in view of the fact that the steering torque applied to the steering wheel appears as the relative rotation angle between the first rotation shaft 110 and the second rotation shaft 120, the first The steering torque is determined based on the relative rotation angle between the rotation shaft 110 and the second rotation shaft 120. That is, the relative rotation angle between the first rotation shaft 110 and the second rotation shaft 120 is detected by the detection device 10, and the ECU 200 grasps the steering torque based on the output value from the detection device 10 and grasps the grasped steering. The drive of the electric motor 190 is controlled based on the torque. The torque generated by the electric motor 190 is transmitted to the second rotating shaft 120 via the worm gear 191 and the worm wheel 180. Thereby, the torque generated by the electric motor 190 assists the driver's steering force applied to the steering wheel.

Below, the detection apparatus 10 is explained in full detail.
The detection device 10 includes a magnet 20 attached to the first rotation shaft 110, and a first rotation shaft 110 and a second rotation shaft 120 based on a magnetic field of the magnet 20 (a magnetic field generated from the magnet 20). A relative angle sensor 30 that outputs an electrical signal corresponding to the relative rotation angle, and a printed circuit board 40 on which the relative angle sensor 30 is mounted are provided. The detection device 10 includes a base 50 that is attached to the second rotating shaft 120 and supports the printed circuit board 40, and a bottomed cylindrical flat cable cover 60 that houses a flat cable 70 described later. . The detection device 10 has a flat cable 70 having one end connected to a terminal provided on the printed circuit board 40 and the other end connected to a terminal fixed to the flat cable cover 60, and a flat cable. A harness comp 300 for connecting the terminal fixed to the cable cover 60 and the ECU 200 is provided.

The magnet 20 has a cylindrical (donut) shape, and a first rotating shaft 110 is fitted inside the magnet 20 and rotates together with the first rotating shaft 110. Then, N poles and S poles are alternately arranged in the circumferential direction of the first rotating shaft 110 and are magnetized in the circumferential direction.
The relative angle sensor 30 is located outside the outer peripheral surface of the magnet 20 in the rotational radius direction of the first rotating shaft 110 and in the region where the magnet 20 is provided in the axial direction of the first rotating shaft 110. Is arranged. The relative angle sensor 30 according to the present embodiment is an MR sensor (magnetoresistive element) that is a magnetic sensor utilizing the fact that the resistance value changes due to a magnetic field. The relative angle sensor 30 outputs an electrical signal corresponding to the relative rotation angle between the first rotating shaft 110 and the second rotating shaft 120 based on the magnetic field of the magnet 20 (the magnetic field generated from the magnet 20). Thus, the relative rotation angle between the two rotation shafts arranged coaxially is detected. The relative angle sensor 30 and the relative rotation angle detection method will be described in detail later.

The printed circuit board 40 is fixed to the base 50 with, for example, a bolt so as to be disposed outside the outer peripheral surface of the magnet 20 in the rotational radius direction of the first rotating shaft 110.
The base 50 is a disk-shaped member, is fitted to the second rotating shaft 120, and rotates together with the second rotating shaft 120.
The flat cable cover 60 is a bottomed cylindrical member and is fixed to the housing 140. As an aspect for fixing the flat cable cover 60 to the housing 140, the following aspects can be exemplified. That is, on the outer peripheral surface of the flat cable cover 60, a plurality of convex portions 61 (four in this embodiment at intervals of 90 degrees) are formed to extend outward at equal intervals in the circumferential direction. On the other hand, the same number of concave portions 151 as the convex portions 61 are formed in the first housing 150 of the housing 140. Then, the convex portion 61 of the flat cable cover 60 is fitted into the concave portion 151 formed in the first housing 150, thereby positioning the second rotating shaft 120 in the rotational direction. The axial positioning is performed by pressing the upper surface of the flat cable cover 60 with the second housing 160. Alternatively, the flat cable cover 60 may be fixed to the first housing 150 or the second housing 160 with, for example, bolts.

The flat cable 70 has one end connected to the terminal 41 of the printed circuit board 40 and the other end connected to a connection terminal 62 provided on the inner side of the flat cable cover 60. In a space formed by one end face and the inner side of the flat cable cover 60, it is housed in a spirally wound state. When viewed from the other end side in the axial direction, the flat cable 70 is wound in the right direction as shown in FIG. 2, and the steering wheel, in other words, the first rotating shaft 110 and the second rotating shaft are wound. When the rotary shaft 120 is rotated in the right direction, one end rotates in the right direction in accordance with the rotation of the second rotary shaft 120, so that the number of turns is larger than that in the neutral state where the steering wheel is not rotated. To increase. On the other hand, when the steering wheel is rotated in the left direction, the number of turns is reduced as compared with the neutral state in which the steering wheel is not rotated.
The harness comp 300 has a function of transmitting an output signal from the relative angle sensor 30 to the ECU 200. The harness comp 300 will be described in detail later.

Below, the relative angle sensor 30 which concerns on this Embodiment is demonstrated.
The relative angle sensor 30 according to the present embodiment is an MR sensor (magnetoresistive element) that utilizes a change in resistance value due to a magnetic field (magnetic field).

First, the operation principle of the MR sensor will be described.
The MR sensor is composed of an Si or glass substrate and a thin film of an alloy mainly composed of a ferromagnetic metal such as Ni-Fe formed thereon, and the resistance value of the thin film ferromagnetic metal is in a specific direction. The resistance value changes according to the strength of the magnetic field.

FIG. 3 is a diagram showing the direction of the current flowing through the thin film ferromagnetic metal and the direction of the applied magnetic field. FIG. 4 is a diagram showing the relationship between the magnetic field strength and the resistance value of the thin film ferromagnetic metal when the magnetic field strength is changed in the state of FIG.
As shown in FIG. 3, a current is passed through the thin film ferromagnetic metal formed in a rectangular shape on the substrate in the longitudinal direction of the rectangle, that is, in the Y direction in the figure. On the other hand, the magnetic field H is applied in a direction perpendicular to the current direction (Y direction) (X direction in the figure), and in this state, the strength of the magnetic field is changed. FIG. 4 shows how the resistance value of the thin film ferromagnetic metal changes at this time.

As shown in FIG. 4, even if the strength of the magnetic field is changed, the resistance value change from the time of no magnetic field (magnetic field strength zero) is about 3% at the maximum.
Hereinafter, a region outside which the resistance value change amount (ΔR) can be approximately expressed by the equation “ΔR∝H ² ” is referred to as a “saturation sensitivity region”. In the saturation sensitivity region, the resistance value change of 3% does not change when the magnetic field intensity is higher than a certain magnetic field intensity (hereinafter referred to as “specified magnetic field intensity”).

FIG. 5 is a diagram showing the direction of the current flowing through the thin film ferromagnetic metal and the direction of the applied magnetic field. FIG. 6 is a diagram showing the relationship between the direction of the magnetic field and the resistance value of the thin film ferromagnetic metal.
As shown in FIG. 5, a current is passed in the rectangular longitudinal direction of the thin film ferromagnetic metal formed in a rectangular shape, that is, the Y direction in the figure, and an angle change θ is given to the current direction as the direction of the magnetic field. At this time, in order to know the change in the resistance value of the thin film ferromagnetic metal due to the direction of the magnetic field, the applied magnetic field strength is set to be equal to or higher than the above-mentioned prescribed magnetic field strength at which the resistance value does not change due to the magnetic field strength.

As shown in FIG. 6A, the amount of resistance change becomes maximum when the current direction and the magnetic field direction are perpendicular (θ = 90 °, 270 °), and the current direction and the magnetic field direction are parallel (θ = 0 °). , 180 degrees). When the maximum amount of change in the resistance value in this case is ΔR, the resistance value R of the thin film ferromagnetic metal changes as an angular component in the current direction and the magnetic field direction, and is expressed by the equation (1), and is shown in FIG. As shown in b).
R = R0−ΔRsin ² θ (1)
Here, R0 is a resistance value when a magnetic field having a specified magnetic field strength or more is applied parallel to the current direction (θ = 0 degree or 180 degrees).
From equation (1), the direction of the magnetic field greater than the prescribed magnetic field strength can be detected by grasping the resistance value of the thin film ferromagnetic metal.

Next, the detection principle of the MR sensor will be described.
FIG. 7A is a diagram showing an example of an MR sensor that uses the principle of detecting the direction of a magnetic field with a magnetic field strength equal to or higher than a prescribed magnetic field strength. FIG. 7B is a diagram showing the configuration of the MR sensor shown in FIG.
In the thin film ferromagnetic metal of the MR sensor shown in FIG. 7A, a first element E1 formed so that the longitudinal direction is long and a second element E2 formed so that the lateral direction is long are in series. Is arranged.

In the thin-film ferromagnetic metal having such a shape, the vertical magnetic field that causes the largest resistance value change with respect to the first element E1 is the magnetic field direction with the smallest resistance value change with respect to the second element E2. The resistance value R1 of the first element E1 is given by the formula (2), and the resistance value R2 of the second element E2 is given by the formula (3).
R1 = R0−ΔRsin ² θ (2)
R2 = R0−ΔRcos ² θ (3)

An equivalent circuit of the MR sensor having the element configuration as shown in FIG. 7A is as shown in FIG.
As shown in FIG. 7, the end of the first element E1 that is not connected to the second element E2 is the ground (Gnd), and the second element E2 is connected to the first element E1. When the output voltage at the other end is Vcc, the output voltage Vout at the connection between the first element E1 and the second element E2 is given by equation (4).
Vout = (R1 / (R1 + R2)) × Vcc (4)

When formulas (2) and (3) are substituted into formula (4) and rearranged, formula (5) is obtained.
Vout = Vcc / 2 + α × cos 2θ (5)
Here, α is α = (ΔR / (2 (2 × R0−ΔR))) × Vcc.
From equation (5), the direction of the magnetic field can be grasped by detecting Vout.

FIG. 8 is a diagram showing the relationship between the change in the magnetic field direction and the output of the MR sensor when the magnet moves linearly.
As shown in FIG. 8 (a), the MR sensor shown in FIG. 7 is applied to a magnet in which N poles and S poles are alternately arranged. It is arranged so that the change in the direction of the magnetic field contributes to the sensor surface of the MR sensor.

  Then, as shown in FIG. 8A, the magnet has a distance from the center of the N pole to the center of the S pole shown in FIG. 8C (hereinafter also referred to as “magnetization pitch”) λ. Move to the left. In such a case, a magnetic field in the direction of the arrow shown in FIG. 8C is applied to the MR sensor in accordance with the position of the magnet. When the magnet moves at the magnetization pitch λ, the magnetic field on the sensor surface is reduced. The direction rotates 1/2. Therefore, the waveform of the output voltage Vout at the connection between the first element E1 and the second element E2 is shown in FIG. 8D from “Vout = Vcc / 2 + α × cos 2θ” shown in the equation (5). Thus, a waveform of one cycle is obtained.

FIG. 9 is a diagram illustrating another example of the MR sensor.
If the element configuration shown in FIG. 9A is used instead of the element configuration shown in FIG. 7, as shown in FIG. 9B, a generally known Wheatstone bridge (full bridge) Can be configured. Therefore, the detection accuracy can be increased by using the MR sensor having the element configuration shown in FIG.

A method for detecting the direction of movement of the magnet will be described.
From the relationship between the direction of the magnetic field shown in FIG. 6 and the resistance value of the thin film ferromagnetic metal, and from the equation (1) “R = R0−ΔRsin ² θ”, the direction of the magnetic field can be expressed as the current when viewed in FIG. The resistance value of the thin-film ferromagnetic metal is the same whether it is rotated clockwise or counterclockwise with respect to the direction. Therefore, even if the resistance value of the thin film ferromagnetic metal can be grasped, the direction of movement of the magnet cannot be grasped.

FIG. 10 is a diagram illustrating an example of a combination of outputs used to detect the moving direction of the magnet. As shown in FIG. 10, it is possible to detect the moving direction of the magnet by combining two outputs having a phase difference of ¼ period. In order to obtain these outputs, two MR sensors may be arranged so as to have the phase relationship of (i) and (ii) or (i) and (iv) shown in FIG.
FIG. 11 is a diagram illustrating an example of arrangement of MR sensors. As shown in FIG. 11A, two MR sensors are overlapped, and as shown in FIG. 11B, one of these two MR sensors is disposed with an inclination of 45 degrees with respect to the other sensor. It is also suitable.

  FIG. 12 is a diagram illustrating another example of the MR sensor. As shown in FIG. 12 (a), two sets of full-bridge elements are inclined on each other by 45 degrees and formed on a single substrate to form an element structure that becomes an equivalent circuit as shown in FIG. 12 (b). Is also suitable. As a result, as shown in FIG. 12C, an accurate sine wave and cosine wave can be output with one MR sensor. Therefore, the movement direction and the amount of movement of the magnet with respect to the MR sensor can be grasped from the output value of the MR sensor having the element configuration shown in FIG.

  In view of the characteristics of the MR sensor described above, in the detection apparatus 10 according to the present embodiment, the MR sensor having the element configuration shown in FIG. As described above, the relative angle sensor 30 is disposed perpendicular to the outer peripheral surface of the magnet 20, and the position of the second rotation shaft 120 in the axial direction is within the region of the magnet 20. Therefore, in such a case, the relative angle sensor 30 changes the direction of the magnetic field as shown in FIG. 8C according to the position of the magnet 20 due to the magnetic field of the magnet 20 rotating together with the first rotating shaft 110. It becomes.

As a result, when the magnet 20 moves (rotates) the magnetization pitch λ, the direction of the magnetic field rotates 1/2 on the magnetically sensitive surface of the relative angle sensor 30, and the output values VoutA and VoutB from the relative angle sensor 30 are As shown in FIG. 12C, a cosine curve (cosine wave) and a sine curve (sine wave) having a quarter-phase phase difference are obtained.
That is, when the driver rotates the steering wheel, the first rotating shaft 110 rotates with the rotation of the steering wheel, and the torsion bar 130 is twisted. Then, the second rotating shaft 120 rotates with a slight delay from the first rotating shaft 110. This delay appears as a difference in rotation angle between the first rotating shaft 110 and the second rotating shaft 120 connected to the torsion bar 130. The detection device 10 outputs VoutA and VoutB, which are a cosine curve and a sine curve, with a phase difference of ¼ period corresponding to the difference in rotation angle.
The magnetic sensitive surface of the relative angle sensor 30 is a surface that can detect a magnetic field in the relative angle sensor 30.

Based on the output values VoutA and VoutB of the relative angle sensor 30, the relative angle calculation unit 210 of the ECU 200 determines the relative rotation angle θt between the first rotation shaft 110 and the second rotation shaft 120 using the following equation (6). Use to calculate.
θt = arctan (VoutB / VoutA) (6)
In this way, the relative angle calculation unit 210 applies the relative rotation angle and twist direction between the first rotation shaft 110 and the second rotation shaft 120 based on the output value from the relative angle sensor 30, that is, the steering wheel. It is possible to grasp the magnitude and direction of the applied torque.

Further, when the detection apparatus 10 configured as described above is assembled, the flat cable cover 60, the base 50 to which the printed circuit board 40 is attached, and the flat cable 70 accommodated between the flat cable cover 60 and the base 50. Are previously unitized. Then, the unit is attached to the first housing 150 in which the second rotating shaft 120 is assembled so that the convex portion 61 of the flat cable cover 60 fits into the concave portion 151 of the first housing 150. At that time, the base 50 is attached to the second rotating shaft 120.
Thus, the assembly property can be improved by making the detection apparatus 10 a structure that can be unitized in advance.

Next, the harness comp 300 will be described.
FIG. 13 is an external view of the harness comp 300 according to the present embodiment.
The harness comp 300 includes a plurality of electric wires 310, a grommet 320 as an example of an electric wire holding member that holds the plurality of electric wires 310, and a socket 330 that suppresses movement of the grommet 320. The harness comp 300 includes a first connector 350 connected to one end of the plurality of electric wires 310, and a second connector 360 connected to the other end of the plurality of electric wires 310. Yes. In addition, the harness comp 300 bundles the plurality of electric wires 310 between the first cover 370 that bundles the plurality of electric wires 310 between the grommet 320 and the first connector 350, and between the grommet 320 and the second connector 360. A second cover 380.

  The harness comp 300 according to the present embodiment has four electric wires 310, and one end of the four electric wires 310 is connected to the printed circuit board 40 via the first connector 350 or the like. In addition, the other ends of the four electric wires 310 are connected to the ECU 200 via the second connector 360 or the like. The four electric wires 310 are used for power supply from the ECU 200 to the relative angle sensor 30 and transmission of output values from the relative angle sensor 30 to the ECU 200.

  The electric wire 310 is a conductor in which a conductor such as a metal stretched linearly is covered with an insulator, and conducts electricity. The harness comp 300 according to the present embodiment has four electric wires 310, one end of the four electric wires 310 is connected to the first connector 350, and the other end is the first end. 2 and is bundled by a first cover 370 and a second cover 380 which are insulators.

FIG. 14 is a schematic configuration diagram of the grommet 320 and the socket 330. (A) is the perspective view seen from the 2nd connector 360 side, (b) is the perspective view seen from the 1st connector 350 side.
FIG. 15A is a schematic configuration diagram of the second housing 160. FIG.15 (b) is BB sectional drawing in (a). FIG. 15C is a view showing a state in which the harness comp 300 is attached to the second housing 160.

  The grommet 320 includes an elliptical columnar portion 321 having a substantially elliptical column shape and a cylindrical portion 322 having a cylindrical shape. The elliptical column part 321 is formed with the same number of wire holes 323 as the number of the wires 310 (four in the present embodiment) formed in the column direction so as to allow the wires 310 to pass therethrough. In addition, a protrusion 324 protruding outward from the outer peripheral surface over the entire circumference in the circumferential direction is provided on the outer peripheral surface of the elliptical column part 321 in the column direction (the hole direction of the electric wire hole 323 (hereinafter referred to as “the electric wire hole direction”). In some cases, there are a plurality of (three in the present embodiment). The size of the outermost peripheral portion of the protrusion 324 is larger than the size of the inner communication hole 161 a of the communication hole 161 of the second housing 160. The outer peripheral surface of the elliptical column part 321 is the same as or slightly smaller than the inner peripheral surface of the surrounding wall 163 that forms the inner communication hole 161 a of the communication hole 161 of the second housing 160, and is fitted to the second housing 160. In the state, the protrusion 324 that protrudes outward from the outer peripheral surface thereof is elastically deformed inward as a whole by being pushed by the surrounding wall 163. Accordingly, the grommet 320 seals the inner communication hole 161a of the communication hole 161 of the second housing 160, presses the electric wire 310 inserted into the electric wire hole 323 at the peripheral portion of the electric wire hole 323, and moves the electric wire 310. Suppress. The grommet 320 is formed into the predetermined shape by vulcanizing and molding an elastic material such as rubber.

  The socket 330 has a pair of dividing members that can be divided in a direction intersecting the hole direction of the communication hole 161 of the second housing 160. In this embodiment, it can be divided in the axial direction, and in FIG. 14, it has a lower member 340 disposed on the lower side and an upper member 331 disposed on the upper side. The socket 330 is disposed between the lower member 340 and the upper member 331, and includes a plurality of retaining members 336 (this embodiment) for preventing the socket 330 from being removed from the communication hole 161 of the second housing 160. 2). The socket 330 is molded into the following predetermined shape by injection molding of resin. In addition, the socket 330 functions as an example of an outer member that is disposed at a portion outside the grommet 320 in the communication hole 161 of the second housing 160.

  The socket 330 is formed therein with a passage through which the electric wire 310 can be passed, and has a plurality of inlets (two in the present embodiment) to the passage. There are a plurality of outlets 330c (three in this embodiment). Therefore, the outlet and the direction of the electric wire 310 can be arbitrarily changed according to the presence of other parts arranged outside the housing 140. This will be described in detail below.

  The lower member 340 includes a support part 341 that supports the upper member 331 and an elliptical columnar part 342 having an elliptical column shape in which a through hole 342a through which the plurality of electric wires 310 are passed is formed in the center part. The lower member 340 includes two crescent column portions 343 projecting in a crescent column shape outward from the end surface of the elliptic column portion 342 opposite to the side where the support portion 341 is disposed, on both sides of the long side of the ellipse. Prepare. The support portion 341, the elliptical column portion 342, and the crescent moon column portion 343 are arranged in the wire hole direction in order from the second connector 360 side.

  The support portion 341 is a lower facing surface 341 a facing the upper facing surface 331 a described later of the upper member 331, and an end surface opposite to the elliptical column portion 342, and is the outermost in the communication hole 161 of the second housing 160. A lower outermost surface 341b and a lower side surface 341c which is a side surface. The support portion 341 has a protrusion recess 341d that is recessed from the lower facing surface 341a in one axial end direction (downward in FIG. 14) and into which a protrusion 332 described later of the upper member 331 is fitted. doing. The support portion 341 is recessed from the lower facing surface 341a in one axial direction (downward in FIG. 14) and forms a space through which the electric wire 310 passing through the through hole 342a passes. A recess 344 is provided. The lower side surface 341c and the protrusion recess 341d are provided on both sides of the passage lower recess 344, respectively. The lower side surface 341c is formed at a position that forms a space that does not interfere with the hook 390 described later even if the hook 390 is elastically deformed by a desired amount.

The lower recess 344 for the passage is formed at the end of the support portion 341 on the grommet 320 side so as to be continuous with the through hole 342a of the elliptical column portion 342, and is formed so as to extend from that position to the lower outermost surface 341b. ing. Since the lower recess 344 for the passage is connected to the lower outermost surface 341b, the lower opening 344a is formed in the lower outermost surface 341b. In the present embodiment, the lower recess 344 for the passage has three passages from the elliptical column part 342 side to the lower outermost surface 341b so that the three lower openings 344a are formed in the lower outermost surface 341b. It is branched to.
Further, the support portion 341 has a direction crossing the electric wire hole direction from the bottom of the lower recess 344 for the passage (in the present embodiment, the other end direction in the axial direction (upward in FIG. 14)). A plurality of extending portions 344b extending is provided. The lower recess 344 for the passage and the plurality of extending portions 344b will be described in detail later.

  The elliptical column part 342 is basically an elliptical columnar plate-like part, protrudes from the end surface on the support part 341 side toward the support part 341 in the direction of the electric wire hole, and in the long side direction, in other words, the lower member 340. Hooks 390 that are elastically deformed in a direction intersecting the direction of division with the upper member 331 are provided at both ends of the long side of the ellipse. The hook 390 is formed so that the outer surface thereof is along the outer peripheral surface of the elliptical column part 342. The hook 390 includes an inclined surface 391 that is inclined with respect to the electric wire hole direction so as to protrude outward from the elliptical columnar outer peripheral surface of the elliptical column part 342, and a long side that extends from the end of the inclined surface 391 to the inside in the long side direction. A plane parallel to the direction, in other words, a vertical plane 392 that is a plane perpendicular to the direction of the wire hole is provided in the middle of the direction of the wire hole. A long hole 393 is formed between the starting end of the inclined surface 391 and the main body of the elliptical column part 342 so that the inclined surface 391 and the vertical surface 392 are easily elastically deformed in the long side direction.

  The upper member 331 is an end surface opposite to the upper facing surface 331a facing the lower facing surface 341a of the support portion 341 of the lower member 340 and the elliptical column portion 342 of the lower member 340, and is the second housing 160. The upper outermost surface 331b located on the outermost side in the communication hole 161 and the upper side surface 331c which is a side surface. Two columnar protrusions 332 projecting from the upper facing surface 331a in one axial direction are provided on the upper facing surface 331a in the long side direction of the ellipse in the elliptical column portion 342. The upper member 331 is recessed from the upper facing surface 331a in the other axial end direction (upward in FIG. 14) and cooperates with the passage lower recess 344 of the support portion 341 of the lower member 340. A passage upper recess 334 is provided that forms a space through which the electric wire 310 that has passed through the through hole 342a passes.

  The upper recess 334 for the passage is recessed so as to correspond to the lower recess 344 for the passage of the lower member 340, and is continuous with the through hole 342 a of the elliptical column part 342 of the lower member 340 at the end on the grommet 320 side. And is formed so as to extend from the position to the uppermost outermost surface 331b. Since the upper recess 334 for the passage is connected to the upper outermost surface 331b, an upper opening 334a is formed in the upper outermost surface 331b. In the present embodiment, three upper openings 334 a are formed at positions corresponding to the three lower openings 344 a formed on the lower outermost surface 341 b of the lower member 340, and the upper recess 334 for the passage is formed. , Branching into three passages from the end on the grommet 320 side to the uppermost outermost surface 331b. The upper recess 334 for the passage of the upper member 331 is configured such that the upper member 331 is attached to the lower member 340 and the upper facing surface 331a of the upper member 331 and the lower facing surface 341a of the lower member 340 are in contact with each other. Together with the lower concave portion 344, a plurality of electric wires 310 are led into the grommet 320 side and a space is formed so as to pass out from the upper outermost surface 331b side.

The upper side surface 331c is formed at a position between the hook 390 provided on the lower member 340 and a space that does not interfere even if the hook 390 is elastically deformed by a desired amount.
When the protrusion 332 of the upper member 331 is fitted into the protrusion recess 341d of the lower member 340 and the upper facing surface 331a of the upper member 331 and the lower facing surface 341a of the lower member 340 are in contact, the upper member 331 The outer peripheral surface of the support portion 341 of the lower member 340 is formed to be the same as the outer peripheral surface of the elliptical column portion 342.

  The retaining members 336 are disposed between the hooks 390 provided on both sides of the elliptical long side of the socket 330 and the lower side surface 341c of the lower member 340 and the upper side surface 331c of the upper member 331. The retaining member 336 is an example of a deformation suppressing member that is disposed inside the hook 390 and suppresses elastic deformation of the hook 390 when the hook 390 is fitted in a recess 162 formed in the second housing 160. is there. The retaining member 336 includes a rectangular parallelepiped base 336a extending in the direction of the electric wire hole, and a bent portion 336b extending inward in the long side direction of the ellipse from the outer end of the base 336a in the direction of the electric wire hole. .

The base 336a includes a lower protrusion 336c that protrudes downward (on the lower member 340 side) from one axial end surface (the lower end surface in FIG. 14), and the other axial end surface (the upper end surface in FIG. 14). It has an upper protrusion 336d that protrudes upward (from the end face) (on the upper member 331 side) and an inner protrusion 336e that protrudes inward from the inner end face in the long side direction of the ellipse. The lower protrusion 336c, the upper protrusion 336d, and the inner protrusion 336e each have an inclined surface that is inclined with respect to the electric wire hole direction, and a vertical surface that is parallel to the direction perpendicular to the electric wire hole direction from the end of the inclined surface. Have.
The bent portion 336b has an inclined surface that is inclined with respect to the long side direction of the ellipse of the socket 330 at its tip and inside the wire hole direction. In the bent portion 336b, a concave portion 336f recessed from the tip is formed in the central portion in the axial direction of the bent portion 336b.

Next, a space for passing the electric wire 310 in the socket 330 will be described.
FIG. 16 is a view of the lower member 340 as viewed from the upper member 331 side. In FIG. 16, the elliptical column part 342 is shown on the upper side. In the following description, the elliptical column part 342 side is the upper side, the lower opening 344a side is the lower side, and the center line of the through hole 342a of the elliptical column part 342 is the horizontal center line.
The passage lower recess 344 has a symmetrical shape with respect to the lateral center line. One of the three lower openings 344a exists on the center line, and the other two lower openings 344a exist on the left and right sides, respectively. When the passage from the through hole 342a to the lower opening 344a at the center is the main passage 330a, the branch passages 330b branched from the main passage 330a are provided above the two left and right lower openings 344a, respectively. . Each of the branch paths 330b is formed to extend outward in a direction intersecting with the center line direction. The passage upper recess 334 is symmetrical to the passage lower recess 344 with respect to a plane orthogonal to the axial direction. The lower opening 344a of the lower member 340 and the upper opening 334a of the upper member 331 cooperate to form the outlet 330c of the electric wire 310.

  The plurality of extending portions 344b provided in the lower recess 344 for the passage are arranged symmetrically with respect to the horizontal center line, and the shape thereof is also symmetrical. In the present embodiment, five extending portions 344b are provided, and one of them is provided at the end (upper end) on the elliptical column 342 side on the center line. The other four extending portions 344b are provided two each on the left and right, and two on one side are provided so as to be arranged in the center line direction. And the upper extension part 344b of two of one side is provided so that it may exist in the outer side rather than the lower extension part 344b. The extension part 344b provided on the center line is configured so that there are one entrance to the inside of the socket 330 on each of the left and right sides. In addition, the space | interval which the electric wire 310 passes is ensured around the extension part 344b.

FIG. 17 is a diagram illustrating a state where the electric wire 310 is passed through the socket 330. (A) is a figure which shows the state from which all the electric wires 310 have come out from the left exit 330c, (b) is a figure which shows the state in which all the electric wires 310 have come out from the center exit 330c, (C) is a figure which shows the state from which all the electric wires 310 have come out from the right exit 330c. In FIG. 17, two of the four electric wires 310 positioned on the lower side are shown.
In the socket 330 according to the present embodiment, since the plurality of extending portions 344b are provided, it is possible to adjust the length of the electric wire 310 that goes out of the socket 330 inside the socket 330. For example, as shown in FIG. 17 (a), when all the electric wires 310 are taken out from the left outlet 330c, the electric wires 310 that have entered from the left inlet are passed through the left side of the left upper extension portion 344b, Through the right side of the lower left extending portion 344b, the left outlet 330c exits via the upper branch path 330b of the left outlet 330c. On the other hand, the electric wire 310 that has entered from the right side inlet passes through the left side of the upper right side extending part 344b, passes through the right side of the lower right side extending part 344b, and passes through the upper branch path 330b of the left side outlet 330c. It is made to exit from the left outlet 330c.

Thus, the upper left extension 344b and the upper right extension 344b are provided outside the lower left extension 344b and the lower right extension 344b, respectively. The lengths of all the electric wires 310 coming out of the socket 330 can be made substantially the same. In other words, the arrangement positions and shapes of the plurality of extending portions 344b may be configured so that the lengths of the portions of all the electric wires 310 that go out of the socket 330 can be adjusted to be substantially the same.
Moreover, when all the electric wires 310 are taken out from the left outlet 330c, even if a force acts on the electric wires 310 outside the socket 330 by passing the electric wires 310 as shown in FIG. The force is difficult to be transmitted to the portion holding 310. That is, even if a force is applied to the electric wire 310 outside the socket 330, the electric wire 310 that has entered from the left entrance hardly comes into contact with the lower left extension 344b or the upper left extension 344b. Thus, the force is not easily transmitted to the electric wire holding portion of the grommet 320. In addition, the electric wire 310 that has entered from the right entrance becomes difficult to move by coming into contact with the lower right extending portion 344b and the upper right extending portion 344b, and the force is transmitted to the electric wire holding portion of the grommet 320. It becomes difficult.
When all the electric wires 310 are taken out from the right outlet 330c, as shown in FIG. 17C, the electric wires 310 that have entered from the left inlet and the electric wires 310 that have entered from the right inlet are passed through the above-described manner. The same effect as that obtained can be obtained.

  When all the electric wires 310 are taken out from the central outlet 330c, as shown in FIG. 17B, the electric wires 310 that have entered from the left inlet are passed through the left side of the left upper extension 344b and the lower left side. Through the right side of the extended portion 344b, the central outlet 330c is used. On the other hand, the electric wire 310 that has entered from the right inlet is passed through the right side of the upper right extension 344b and through the left side of the lower right extension 344b through the central outlet 330c. As a result, even if a force acts on the electric wire 310 outside the socket 330, the electric wire 310 that has entered from the left entrance moves by contacting the lower left extension 344b and the upper left extension 344b. It becomes difficult to transmit the force to the wire holding portion of the grommet 320. In addition, the electric wire 310 that has entered from the right entrance becomes difficult to move by coming into contact with the lower right extending portion 344b and the upper right extending portion 344b, and the force is transmitted to the electric wire holding portion of the grommet 320. It becomes difficult.

  As described above, the socket 330 according to the present embodiment includes the lower recess 344 for the passage, the upper recess 334 for the passage, the extension 344b disposed on the center line, and the like, and guides the electric wire 310 to the inside. It has a plurality of introduction portions, and a plurality of outlet portions 330c, a main passage 330a, a plurality of branch paths 330b, and the like, and a plurality of lead-out portions that respectively lead the introduced electric wires 310 in different directions. . And if the socket 330 which concerns on this Embodiment is used, as shown to Fig.17 (a)-(c), according to presence of the other components arrange | positioned outside the housing 140, the exit of the electric wire 310 and Since the direction can be arbitrarily changed, the plurality of electric wires 310 bundled with the second cover 380 can be prevented from interfering with other components.

FIG. 18 is a diagram illustrating another state in which all the electric wires 310 are passed from the central outlet 330c. 18 also shows two of the four electric wires 310 positioned on the lower side.
When all the electric wires 310 are taken out from the central outlet 330c, as shown in FIG. 18, the electric wires 310 that have entered from the left inlet are passed through the left side of the upper left extension 344b and extended to the lower right side. Through the right side of the exit part 344b, it exits from the central outlet 330c. On the other hand, the electric wire 310 that has entered from the right-side entrance passes through the right side of the upper right extension 344b and passes through the left side of the lower left extension 344b and exits from the central outlet 330c. As a result, even if a force acts on the electric wire 310 outside the socket 330, the electric wire 310 that has entered from the left entrance moves by contacting the upper left extension portion 344b or the lower right extension portion 344b. It becomes difficult to transmit the force to the wire holding portion of the grommet 320 as compared to the state shown in FIG. Further, the electric wire 310 that has entered from the right entrance becomes difficult to move by coming into contact with the extended portion 344b on the upper right side and the extended portion 344b on the lower left side, and is more grommet than the state shown in FIG. It is difficult for force to be transmitted to the 320 electric wire holding portions.

The harness comp 300 configured as described above is assembled as follows.
That is, first, the wire 310 is inserted into each of the plurality of wire holes 323 formed in the grommet 320. Thereafter, an adhesive is applied to the inside of the cylindrical portion 322 of the grommet 320, and positioning is performed so that the plurality of electric wires 310 do not move with respect to the grommet 320. Further, the plurality of electric wires 310 are bundled by the first cover 370.
Then, the plurality of electric wires 310 arranged on the cylindrical portion 322 side of the grommet 320 are passed through the through holes 342a of the elliptical column portion 342 of the socket 330 and are fitted into the lower concave portion 344 for passage of the lower member 340. From the lower opening 344a. Thereafter, the upper member 331 is attached to the lower member 340. That is, the protrusion 332 of the upper member 331 is fitted into the protrusion recess 341d of the lower member 340, and the upper facing surface 331a of the upper member 331 is brought into contact with the lower facing surface 341a of the lower member 340. Then, the plurality of electric wires 310 protruding from the socket 330 are bundled by the second cover 380. In addition, since the adhesive is applied to the inside of the cylindrical portion 322 of the grommet 320, even if a force is applied to the plurality of wires 310 when the plurality of wires 310 are passed through the socket 330, the wires 310 are prevented from being displaced. Is done.
Then, the tips of the plurality of electric wires 310 bundled by the second cover 380 are connected to the second connector 360. On the other hand, the tips of the plurality of electric wires 310 bundled by the first cover 370 arranged opposite to the side on which the cylindrical portion 322 of the grommet 320 is arranged are connected to the first connector 350.

The harness comp 300 is assembled to the electric power steering apparatus 100 as follows.
That is, the first connector 350 is assembled in a state before the first housing 150 and the second housing 160 are assembled with the first rotating shaft 110, the second rotating shaft 120, the detection device 10, and the third housing 170. It passes through the communication hole 161 formed in the second housing 160 from the side. Then, the grommet 320 and the socket are fitted until the protrusion 324 of the grommet 320 is fitted so as to come into contact with the inner peripheral surface of the communication hole 161 and the hook 390 of the socket 330 is fitted in the recess 162 formed in the second housing 160. Push 330 in. When the socket 330 is inserted into the communication hole 161, the inclined surface 391 of the hook 390 comes into contact with the wall around the communication hole 161 in the second housing 160 and is elastically deformed, and then inserted further deeply, so that the inclined surface 391 becomes the second housing. It will return from a deformation | transformation state by fitting in the recessed part 162 of 160. FIG. The grommet 320 has a frictional force generated between the oval column 321 and the wall 163 around the communication hole 161 when the surface of the elliptical column 321 where the cylindrical portion 322 is disposed is pushed by the crescent column 343 of the socket 330. Move inward. In this way, the grommet 320 and the socket 330 are attached to the second housing 160. Then, the retaining member 336 is inserted between the hook 390 and the lower side surface 341 c of the lower member 340 and the upper side surface 331 c of the upper member 331. Further, the first connector 350 is inserted into the terminal of the flat cable cover 60 and the second connector 360 is inserted into the terminal of the ECU 200.

  On the other hand, when removing the harness comp 300, the first connector 350 is removed from the terminal of the flat cable cover 60, the retaining member 336 is pulled out, and the hook 390 of the socket 330 is connected from the outside of the second housing 160 to the inside. The grommet 320 and the socket 330 may be removed from the communication hole 161 of the second housing 160 by pulling forward while being elastically deformed. Since the recess 336f is formed in the retaining member 336, the retaining member 336 can be easily removed by inserting, for example, the tip of a minus driver into the recess 336f. Thereafter, the first connector 350 is pulled out from the communication hole 161 of the second housing 160, and the harness comp 300 is removed.

  In the harness comp 300 configured as described above and attached to the second housing 160, when the grommet 320 is fitted to the second housing 160, the inside of the housing 140 is mainly sealed by the protrusion 324 of the grommet 320. . In addition, the protrusion 324 of the grommet 320 is pressed against the wall 163 around the communication hole 161 of the second housing 160 so as to be elastically deformed so that the diameter of the wire hole 323 is reduced, thereby holding the plurality of wires 310 more strongly. Further, the plurality of electric wires 310 are bonded with an adhesive applied to the inside of the cylindrical portion 322 of the grommet 320. The plurality of electric wires 310 are bent at the plurality of extending portions 344 b inside the socket 330. Thus, even if a force is applied to the plurality of electric wires 310 bundled by the second cover 380 from the outside of the housing 140 after being assembled, the grommet 320 does not apply the force to the portion holding the electric wires 310. Is difficult to be transmitted, and movement of the electric wire 310 relative to the grommet 320 is suppressed. The radial size of the cylindrical portion 322 of the grommet 320 is set so that a gap is provided between the crescent moon column portion 343 of the socket 330 and the inner surface of the through hole 342a of the elliptic column portion 342. Since there is a through hole 342a in the elliptical column 342 in the direction of the electric wire hole of the cylindrical portion 322, the diameter of the electric wire hole 323 of the grommet 320 is reduced, and elastic deformation is allowed to increase in the direction of the electric wire hole. .

  Moreover, since the retaining member 336 is inserted between the hook 390 and the lower side surface 341c of the lower member 340 and the upper side surface 331c of the upper member 331, the hook 390 of the socket 330 is deformed inward. Is suppressed. The lower protrusion 336c, the upper protrusion 336d, and the inner protrusion 336e of the retaining member 336 have an inclined surface and a vertical surface, thereby facilitating the insertion of the retaining member 336 while preventing the retaining member 336 itself. It is difficult to escape. Further, the vertical surface 392 of the hook 390 of the socket 330 is in contact with the vertical surface 162a of the concave portion 162 of the second housing 160, so that the socket 330 and the grommet 320 are prevented from dropping from the second housing 160. Therefore, even if a force is applied to the plurality of electric wires 310 bundled by the second cover 380 from the outside of the housing 140, the grommet 320 is not easily dropped from the communication hole 161. Is prevented from falling off or the connection terminal 62 into which the first connector 350 is inserted is broken.

  Further, the lower protrusion 336c of the retaining member 336 inserted between the hook 390 and the lower side surface 341c of the lower member 340 and the upper side surface 331c of the upper member 331 causes the lower member 340 to move downward. Since 336d presses the upper member 331 upward, the upper member 331 and the lower member 340 are easily brought into contact with the inner peripheral surface of the surrounding wall 163 that forms the communication hole 161. Thereby, it is suppressed that the upper member 331 and the lower member 340 are worn due to frequent contact with the inner peripheral surface of the surrounding wall 163 forming the communication hole 161 with a strong force.

  Further, even if the harness comp 300 is carried alone, the electric wire 310 is held so as not to move with respect to the grommet 320, so that an operator who assembles the harness comp 300 can move from the grommet 320 to the first connector 350. Can be easily assembled without paying attention to the length of the wire 310.

FIG. 19 is a view showing another form of the housing 140.
A part or all of the outer communication hole 161b described with reference to FIGS. 2 and 15 may be formed by the second housing 160 and the third housing 170 as shown in FIG. In other words, the third housing 170 may be fixed to the second housing 160 with a bolt or the like, so that the second housing 160 and the third housing 170 cooperate to form the outer communication hole 161b. That is, as shown in FIG. 19A, the outer communication hole 161b is opened by eliminating the wall surface on the other end side (upper side in FIG. 1) of the outer communication hole 161b in the second housing 160 in the axial direction. To do. On the other hand, the third housing 170 is provided with an extending portion 172 that extends outward from the fastening surface with the second housing 160 in the direction of the electric wire hole.

When the harness comp 300 is assembled to the electric power steering apparatus 100, the grommet 320, the lower member 340 and the upper member 331 of the socket 330 are mounted on the second housing 160 in the same manner as in the above-described embodiment, and the first housing After the connector 350 is inserted into the terminal of the flat cable cover 60, the third housing 170 is attached to the second housing 160. Thereby, as shown in FIG. 19B, the upper surface of the socket 330 is covered with the extending portion 172 of the third housing 170. Then, the retaining member 336 is inserted between the hook 390 and the lower side surface 341 c of the lower member 340 and the upper side surface 331 c of the upper member 331.
When the harness comp 300 is removed, the upper surface of the socket 330 is opened by removing the third housing 170 from the second housing 160. Therefore, the socket 330 and the grommet 320 can be easily detached from the second housing 160.

  In addition, in embodiment mentioned above, although the socket 330 is comprised with the upper side member 331 and the lower side member 340 which are a pair of division members which can be divided | segmented to an axial direction, it is not limited to this form in particular. For example, the socket 330 may be configured by a pair of divided members that can be divided in the axial direction and the wire hole direction, and the outlets 330c that output the plurality of wires 310 may be arranged in the axial direction. And as a passage for electric wires 310 inside socket 330, a passage inclined in one end direction (downward in FIG. 14) in the axial direction with respect to the electric wire hole direction, an electric wire hole direction passage, and an electric wire hole direction And a passage inclined in the other end direction in the axial direction (upward in FIG. 14). As a result, the outlet and direction of the electric wire 310 can be arbitrarily changed in the axial direction in accordance with the presence of other components arranged outside the housing 140, so that the plurality of electric wires bundled by the second cover 380 It is possible to prevent 310 from interfering with other components.

DESCRIPTION OF SYMBOLS 10 ... Detection apparatus, 20 ... Magnet, 30 ... Relative angle sensor, 40 ... Printed circuit board, 50 ... Base, 60 ... Flat cable cover, 70 ... Flat cable, 100 ... Electric power steering apparatus, 110 ... 1st rotating shaft, DESCRIPTION OF SYMBOLS 120 ... 2nd rotating shaft, 130 ... Torsion bar, 140 ... Housing, 180 ... Worm wheel, 190 ... Electric motor, 200 ... Electronic control unit (ECU), 210 ... Relative angle calculation part, 300 ... Harness comp, 310 ... Electric wire, 320 ... grommet, 330 ... socket, 331 ... upper member, 336 ... retaining member, 340 ... lower member, 350 ... first connector, 360 ... second connector, 370 ... first cover, 380 ... Second cover, 390 ... hook

Claims (5)

A sensor that is housed in a housing in which a communication hole that communicates inside and outside is formed, and that outputs an electrical signal corresponding to the relative rotation angle of two rotation shafts that are coaxially disposed with each other;
An electric wire for transmitting an electric signal output from the sensor to a device disposed outside the housing;
An electric wire holding member that is fitted in the communication hole of the housing and holds the electric wire;
An outer member disposed at a portion outside the wire holding member in the communication hole of the housing;
With
The outer member includes an introduction portion that introduces the electric wire into the inside, and a plurality of extraction portions that output the electric wire introduced through the introduction portion to the outside in different directions, respectively. Detection device.   The said outer member is provided with the some extension part extended in the direction which cross | intersects the hole direction of the said communicating hole of the said housing between the said introducing | transducing part and the said derivation | leading-out part. Relative angle detection device.   There are a plurality of the introduction portions of the outer member, and the plurality of extension portions are introduced from different introduction portions, and the outer members of the different electric wires are led out from the same lead-out portion of the plurality of lead-out portions. The relative angle detection device according to claim 2, wherein the relative angle detection device is provided so that the external lengths can be made substantially the same.   The outer member has a pair of divided members that can be divided in a direction intersecting the hole direction of the communication hole of the housing, and the plurality of extending portions are provided on one divided member of the pair of divided members, The relative angle detection device according to claim 2, wherein the relative angle detection device is formed so as to extend toward the other divided member. A sensor that outputs an electrical signal corresponding to a relative rotation angle of two rotation shafts arranged coaxially with each other;
A housing in which the sensor is housed and a communication hole is formed for communication between the inside and the outside;
An electric wire for transmitting an electric signal output from the sensor to a device disposed outside the housing;
An electric wire holding member that is fitted in the communication hole of the housing and holds the electric wire;
An outer member disposed at a portion outside the wire holding member in the communication hole of the housing;
With
The outer member includes an introduction portion for introducing the electric wire into the inside, and a plurality of extraction portions for outputting the electric wire introduced through the introduction portion to the outside in different directions, respectively. Steering device.

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